CN212250014U

CN212250014U - LPD leakage detection device

Info

Publication number: CN212250014U
Application number: CN202021470851.XU
Authority: CN
Inventors: 徐开放; 卢敢; 韦青青; 杨成清; 顾乐星
Original assignee: Sichuan Gredis Petroleum Technology Co ltd
Current assignee: Sichuan Gredis Petroleum Technology Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2020-12-29
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a LPD leakage detection device, which comprises an overflow joint, an overflow supporting ring, a guide outer cylinder, a guide groove, a connecting rod, a fishing head and a measuring rod, wherein the overflow supporting ring, the guide outer cylinder, the guide groove, the connecting rod, the fishing head and the measuring rod are arranged in the overflow joint; the overflow joint is hollow structure to be internal thread chamber in proper order, hang chamber, overflow chamber, connection chamber, measurement chamber, central vestibule, overflow to be equipped with on the joint with hang the chamber the same overflow hole, with measure the communicating overflow groove in chamber, the direction urceolus is installed on overflowing the trunnion ring, the guide way is installed in the direction urceolus, it installs at overflowing the intracavity to overflow the trunnion ring, the connecting rod passes the guide way to radially be equipped with and be used for spacing suspension pin in the guide way, the connecting rod both ends are connected with fishing head, measuring stick respectively, be equipped with the flowmeter that is located the measurement intracavity on the measuring stick. The utility model discloses in arranging the drilling string in, realized the protection to the instrument, the instrument precision is high to can just satisfy the instrument requirement of leaking hunting with less leak rate.

Description

LPD leakage detection device

Technical Field

The utility model relates to a LPD device that leaks hunting belongs to oil gas well engineering field.

Background

Due to the self characteristics of high investment, high risk, high return and the like of oil and gas well engineering, various complex accidents are inevitably caused in the drilling process, so that the operation period is delayed or large loss is caused. The well leakage is the most common complex accident, and when the well leakage is found in the drilling process, the position of the well leakage needs to be quickly judged so as to make corresponding emergency measures. Most of the existing leakage detection devices are developed by means of the fluid dynamics principle, and the existing leakage detection devices either convert fluid flow into displacement of a diaphragm when leakage occurs to measure the displacement or measure flow by means of the turbine flowmeter measurement principle. However, the design of part of instruments is too complex, the operation procedure is complicated, the reliability is poor, and the data repeatability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses overcome the weak point among the prior art, provide a LPD device that leaks hunting.

The utility model provides a technical scheme that above-mentioned technical problem provided is: an LPD leakage detection device comprises an overflow joint, an overflow supporting ring, a guide outer cylinder, a guide groove, a connecting rod, a fishing head and a measuring rod, wherein the overflow supporting ring, the guide outer cylinder, the guide groove, the connecting rod, the fishing head and the measuring rod are arranged in the overflow joint; the overflow joint is hollow structure to be internal thread chamber in proper order, hang chamber, overflow chamber, connection chamber, measurement chamber, central vestibule, overflow to be equipped with on the joint with hang the chamber the same overflow hole, with measure the communicating overflow groove in chamber, the direction urceolus is installed on overflowing the trunnion ring, the guide way is installed in the direction urceolus, it installs at overflowing the intracavity to overflow the trunnion ring, the connecting rod passes the guide way to radially be equipped with and be used for spacing suspension pin in the guide way, the connecting rod both ends are connected with fishing head, measuring stick respectively, be equipped with the flowmeter that is located the measurement intracavity on the measuring stick.

The further technical scheme is that a positioning hole is radially formed in the overflowing joint, and a positioning pin used for fixing the overflowing supporting ring is installed in the positioning hole.

The further technical scheme is that the guide outer cylinder is connected to the overflowing supporting ring through screw threads.

The further technical scheme is that a fixing hole is radially formed in the guide outer cylinder, a fixing pin for fixing the guide groove is installed in the fixing hole, and the guide groove is fixed to the guide outer cylinder. Thus, the guide outer cylinder is fixed to the overflowing supporting ring, and the supporting ring is positioned to the overflowing joint, so that the orientation of the flow meter probe is ensured.

The further technical scheme is that the number of the overflowing holes is four, and the overflowing holes are uniformly distributed on the overflowing connectors.

The further technical scheme is that the number of the overflow grooves is two, and the overflow grooves are symmetrically distributed on the overflow connectors.

The utility model discloses following beneficial effect has:

1. the utility model adopts the drill pipe short section, and the drill pipe enters the well while drilling, so that the complex drilling sticking and the like can not be caused, and the drill pipe can be accepted on site;

2. the instrument is put into a well while drilling, and can be salvaged through a steel wire after leakage detection; or the instrument can be put in again for leakage detection through the steel wire putting instrument;

3. because the guide groove device is arranged, when the instrument is placed down by the steel wire rope again, the direction of the instrument can be automatically adjusted so as to ensure that the probe is in the slotting direction;

4. for different drill strings, the overflowing supporting ring is adjusted, and instrument strings do not need to be adjusted;

5. after leakage detection, the instrument is fished out through steel wire operation, and the original drill string can be used for leakage stoppage, so that the integrated operation of leakage detection and leakage stoppage is realized;

6. the instrument is arranged in the drill column, so that the instrument is protected, the instrument precision is high, and the leakage detection requirement of the instrument can be met with a low leakage speed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic cross-sectional view of an overcurrent fitting;

FIG. 3 is a schematic exterior surface view of the flow pass sub;

FIG. 4 is a schematic structural diagram of an overcurrent holder;

FIG. 5 is a schematic structural view of the guide outer cylinder;

fig. 6 is a schematic view of the structure of the guide groove.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1, the LPD leakage detection device of the present invention comprises an overflow joint 1, an overflow supporting ring 2 installed in the overflow joint 1, a guiding outer cylinder 3, a guiding groove 4, a connecting rod 5, a fishing head 7, and a measuring rod 8;

as shown in fig. 2 and 3, the flow-passing joint 1 is of a hollow structure and sequentially comprises an internal thread cavity 11, a suspension cavity 12, a flow-passing cavity 13, a connecting cavity 14, a measuring cavity 15 and a central hole cavity 16, and the flow-passing joint 1 is provided with a flow-passing hole 17 which is the same as the suspension cavity 12, a flow-passing groove 18 which is communicated with the measuring cavity 15 and a positioning hole 19;

the structure of the overflowing supporting ring 2 is shown in fig. 4, 12 through holes with the diameter of 15mm are uniformly distributed on the overflowing supporting ring 2, and the overflowing supporting ring is fixed in the overflowing cavity 13 through positioning pins;

the structure of the guide outer cylinder 3 is shown in fig. 5, and the doubling thread is connected in a groove of the overflowing supporting ring 2, wherein a fixing hole 9 is radially arranged;

the structure of guide way 4 is as shown in fig. 6 to install in direction urceolus 3 through the fixed pin, connecting rod 5 passes guide way 4 to radially be equipped with and be used for spacing suspension pin 6 in guide way 4, connecting rod 5 both ends are connected with fishing head 7, measuring stick 8 respectively, be equipped with the flowmeter that is located measurement chamber 16 on the measuring stick 8.

In this embodiment, the number of the overflowing holes 17 is four, and the overflowing holes are uniformly distributed on the overflowing connector 1, and the number of the overflowing grooves 18 is two, and the overflowing grooves are symmetrically distributed on the overflowing connector 1.

When the well leaks, the drill column is used for descending the storage type leak detector to carry out fixed-point leak detection. After the leakage point is determined, the lower steel wire can be wound on the fishing head 7, the connecting rod 5 and the measuring rod 8 are fished out together, and then the leakage is stopped by using a leakage detection pipe column, so that the integration of leakage detection and leakage stoppage is realized.

The above description is not intended to limit the present invention in any way, and the present invention has been disclosed in the above embodiments, but is not intended to be limited thereto, and any person skilled in the art can make some changes or modify equivalent embodiments with equivalent changes when using the technical content disclosed above without departing from the technical scope of the present invention.

Claims

1. The LPD leakage detection device is characterized by comprising an overflowing joint (1), and an overflowing supporting ring (2), a guide outer cylinder (3), a guide groove (4), a connecting rod (5), a fishing head (7) and a measuring rod (8) which are arranged in the overflowing joint (1); the overflow joint (1) is of a hollow structure and sequentially comprises an internal thread cavity (11), a suspension cavity (12), an overflow cavity (13), a connecting cavity (14), a measuring cavity (15) and a central hole cavity (16), the overflowing joint (1) is provided with an overflowing hole (17) which is the same as the suspension cavity (12) and an overflowing groove (18) which is communicated with the measuring cavity (15), the guide outer cylinder (3) is arranged on the overflowing supporting ring (2), the guide groove (4) is arranged in the guide outer cylinder (3), the overflowing supporting ring (2) is arranged in the overflowing cavity (13), the connecting rod (5) passes through the guide groove (4), and is radially provided with a suspension pin (6) used for limiting in the guide groove (4), two ends of the connecting rod (5) are respectively connected with the fishing head (7) and the measuring rod (8), and a flowmeter positioned in the measuring cavity (15) is arranged on the measuring rod (8).

2. The LPD leakage detection device according to claim 1, wherein the overflowing joint (1) is provided with a positioning hole (19) in the radial direction, and a positioning pin for fixing the overflowing supporting ring (2) is installed in the positioning hole (19).

3. The LPD leak detection device according to claim 1, wherein the guide outer cylinder (3) is screwed or welded to the overflow carrier ring (2).

4. The LPD leak detection device according to claim 3, wherein the guide outer cylinder (3) is provided with a fixing hole (9) in a radial direction, and a fixing pin for fixing the guide groove (4) is installed in the fixing hole (9).

5. The LPD leakage detection device according to claim 1, wherein the number of the overflowing holes (17) is four or three, and the overflowing holes are uniformly distributed on the overflowing joint (1).

6. The LPD leakage detection device according to claim 1, wherein the number of the overflow grooves (18) is two, and the overflow grooves are symmetrically distributed on the overflow connector (1) and matched with the orientation of the probe of the flowmeter.